Some setup you must do manually:

1. Include the bootstrap-custom stylesheet in your application.css.scss before
   you import the twitter/bootstrap file:

   @import "bootstrap-custom";

2. If you chose to customize the CSS components remove the following line
   from your application.css.scss, the bootstrap components will be imported
   from the bootstrap-custom.css.scss file:

   @import "twitter/bootstrap";

3. If you chose to customize the JS components add the necessary require
   directive to your application.js file:

   //= require bootstrap-custom

Thank you for using bootstrap-sass-rails!